Getting started with KVM.

virt-install --virt-type kvm --name debian \
--ram 2048 \
--disk /home/user/vm/debian.qcow2,format=qcow2 \
--graphics vnc,listen=0.0.0.0 \
--noautoconsole \
--os-type=linux --os-variant=debianwheezy \
--cdrom=/home/user/Downloads/debian-7.6.0-amd64-netinst.iso

virsh net-start default
virsh start debian
virsh vncdisplay debian